<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<title>Title</title>
		<style type="text/css">
			* {
				margin: 0;
				padding: 0;
			}
			ul {
				list-style: none;
			}
			body {
				background: #000;
			}
			.wrap {
				margin: 100px auto 0;
				width: 630px;
				height: 394px;
				padding: 10px 0 0 10px;
				background: #000;
				overflow: hidden;
				border: 1px solid #fff;
			}
			.wrap li {
				float: left;
				margin: 0 10px 10px 0;
			}
			.wrap img {
				display: block;
				border: 0;
			}
		</style>
		<script src="../jquery-1.12.4.js" type="text/javascript" charset="utf-8"></script>
		<script type="text/javascript">
			$(function(){
				$(".wrap>ul>li").mouseenter(function(){
					$(this).css("opacity","1").siblings().css("opacity","0.4");
				});
				$(".wrap").mouseleave(function(){
					//让所有的li都变亮
					//$("li")
					//$(".wrap li");
					//$(".wrap>ul>li")
					
					// $(this).children().children("li").css("opacity",1);
					$(this).find('li').css("opacity",1);
				});
			});
		</script>
	</head>
	<body>
		<div class="wrap">
			<ul>
				<li><a href="#"><img src="images/01.jpg" alt=""></a></li>
				<li><a href="#"><img src="images/02.jpg" alt=""></a></li>
				<li><a href="#"><img src="images/03.jpg" alt=""></a></li>
				<li><a href="#"><img src="images/04.jpg" alt=""></a></li>
				<li><a href="#"><img src="images/05.jpg" alt=""></a></li>
				<li><a href="#"><img src="images/06.jpg" alt=""></a></li>
			</ul>
		</div>
	</body>
</html>